Automatic spark-controlling means



Dec; 14 1926. I I 1 1,611,054

' c. MA YQRAL AUTOMATIC SPARK CONTROLLING MEANS Filed Nov. '11, 1925WITNESSES V 5 INVENTOR 4w- GalfI/CLO fflayom v I BY 1 ATTORNEYS Patented Dec.- 14,192

cam/taro A O AL, or. PONCE, ron'ro Rico.

7 AUTOMATIC SPARK-CONTROLLING: MEANS. J

Application filed Novcmber,11, 1925. Serial No. 68,4 i5.

tion is to provide automatic means for preventing jerking of the motorof an automotive vehicle when the car is running atlowspeed.

The invention preferably includes means for automatically retarding thespark when the motor is running at low speed, The

mechanism by which I effect such automatic retardationpreferablyjncludes an operating mechanism for the distributor controlleddirectly from an accelerator rod. J

Specific objects of the invention are to provide a. simple and practicalmechanism by which movement-of the accelerator rod may be transmitted tothe distributor, so that the/spark will be automatically advanced andretarded as the speed of the engine is accelerated or decreased; toprovide mechanism which maybe readily attached to any standard make ofautomobile; mechanism.

, which may be manufactured with compara; tive economy; which will notmaterially increase the power necessary to pedally operate theaccelerator rod; and mechanism which will be rugged, durable andefficient in use." I With the above noted and other objects 1n,view, theinvention consists 1n certain primary object of the present inven "12 isoperated through the medium 'of a.

crankarm 14 by the accelerator rod 15, the accelerator rod having a balland socket con. nection 16- with the crank arm. The invention as thusfar described may be entirely conventional, such mechanism or itsequivalent being used on all standard'makesof automobiles forcontrolling the speed-of the' en ine, the accelerator rod 15 beingusually operated by-a ped al (not shown). The present invention is moreparticularly concerned with the provision of means for automaticallyadvancing the sparkas the throttle valve 13 is opened, and retarding thespark as the throttle valve 13 is closed. The distributor 17 isrotatably mounted to turn with support 17, this support having boltedtheretoas at 17 the down offset extensions 18 of a bearing plate 18carrying. a stud 19 which serves as a fulcrum for a cam plate 20 havinga cam slot 21 therein. The plate 20 is fulcrumed intermediate itsends,-and at its lower end is'p-ivotally connected to one'end ofan'operating rod 22.

The other end of the operating. rod has a 8 ball and socketconnection 23with suitable link mechanism 24 conected to the crank arm 14. Thus, as.the accelerator rod is moved in either direction, motion is trans novelfeatures of construction and combina mitted directlythrough theoperating rod 22 tions and arrangements of parts, as will b more fullyhereinafter set forth and pointed out inthe claims. The invention maybemore. fully understood from the following description in connection withthe accom-' panying drawings, .wherein Fig. 1 1s a diagrammatc view inside elevation, showing a carburetor, a distributor, and the mechanismby which the accelerator rod controls the distributor. The distributoris shown in retarded position.

Fig. 2 is a view similar to Fig. 1, but showing the position of theparts when the distributor hasbeen moved to. advance the "spark.

Fig. 3 is an enlarged detail on the line In the drawings I have usedthereference character 10 to designate the carburetor of an automotivevehicle, this carburetor being bolted to the intake manifold 11 intheusual manner. =Twelve- (12). is the rock shaft mounting the butterflyvalve indicated at dotted lines 13 which controls the admission of fuelto the manifold. The rock shaft i vancing the spark. It will also benoted that the longer arm of'slot 21, after the roller has reached theposition of Fig. 2, will have no effect, except a holdingJ effect on Jthe roller, the longer arm of the slot merely 19 providing clearance formovement .of the plate as the accelerator rod is operated at high speedsof the engine.

By virtue of the foregoing construction,

the spark will-be initially advanced as the 0 a .speed of the engine isinitially increased, and after the enginehas reached a normalrunningspeed, no further movement of -the roll.- cr will be had, the rear endof slot 21 simply providing clearance for further movement 1 of theaccelerator red." It will also be noted that as the accelerator rod isshifted to the left as in Fig. 1, throttling down the engine,

the spark will be automatically retarded. so that there will be nojerking or knocking of the. engine at low speeds.

. variations.

It will be understood that the mechanism which I have employed to carryout the invention is subject (to a wide variety of The means forinstance, by which I mount-the cam plate on the dis tributor, may beconsiderably varied. Any

' appropriate linltage might connect the operating rod 22 to theaccelerator15. In fact numerous changes and alterations might be made inthe general form and arrangement of parts described, without departingfrom the invent on. Hence I do not wish to lim t myself to the detailsset forth, but shallcon- I sider myselfat liberty to make such changesand alterations as fairly fall within the- 1 spirit and scopeoflthe'appended claims! "Iclaim' I 1. In an engine, a distributor and a'controlling arm projecting radially therefrom,

a controller plate acting on the controlling arm, means for controllingthe acceleration of the speed of the engine, operatively connected tosaid controller plate, said controller plate having a: slot thereinreceiving the controlling arm,-

2. The combinatlon with a distributor having an ar projecting radiallytherefrom, of a plate iulcrumed' intermediate its ends adjacent thedistributor, and having a cam-slot therein co-actin ally from thedistributor and working in an approximately L shaped cam' slot inthecontroller plate.

4. In tlIlriIH-tOlDOtlVQ engine, tl e combination with anaccelerator'rod for-regulating the speed of the engine, and adistributor including a radially projecting arm, of a plate fulcrumedintermediate its ends adjacent the distributor, and having a cam slotThe combination with a distributor ro- 35 with the arm, and

therein, coacting with the arm, and means operatively directlyconnecting the accelerator rod with the plate whereby the spark isadvanced or retarded as the speed of the engine is accelerated orreduced. 3

CARMELO MAYORAL.

